This is a remix based on this applet. Changes made are:1. Added earth png from Wikipedia2. Used gimp to make the background transparent3. Made the moon png background transparent4. Redesigned the buttons controls slider to the bottom5. Color scheme the background of button, etc.6. Added earth-moon line for visualization and aiding the recording the overhead time for each day. refer to worksheet from osp7. Added day field for visualization the day the various phases occurs if the new moon is day 08. Added text for phases of moon9. Added yellow text to make applet more quickly contextualized Earth view of the Moon and the Orbit view of the moon10. Added day and night model of the background of the earth view of the moon11. Added blind spot model where observer cannot see the moon12. Added color associated green=can see moon from observer location, red=cannot see13. Added reset button14. Added hints to all checkbox buttons slider etc, for just in time help

This is an inquiry-based tutorial for grades 6-9 on the topic of moon phases. Students work with partially-competed diagrams to understand how the Earth's rotation, moon's orbit around Earth, and reflected sunlight all come together to produce a "changing" moon.